Asteroid 2016 RB1 has an estimated size of 7.3 m - 16 m (based on the objects absolute magnitude H=27.8) and it will have a close approach with Earth at about 0.1 LD (Lunar Distances = ~384,000 kilometers) or 0.0003 AU (1 AU = ~150 million kilometers) on 2016, September 7 at 17:20UT and it will reach a peak magnitude of about +12.3.